Several transition metal complexes [ML(phth)], where M = Cu(II), Zn(II), Co(II) and Ni(II), X = phthalic acid and L = Schiff base generated from benzene-1,2,diamine and 4-chlorobenzaldehyde, were synthesized and characterized by IR, UV-Vis, 1H NMR, 13C NMR and mass spectra. According to the physico-chemical studies, all the synthesized metal(II) complexes have a square planar geometry. The DNA nuclease activity of the synthesized metal complexes was investigated using UV absorption assay and viscosity, validating the intercalative mechanism of binding. Antimicrobial activity of the ligand and its metal(II) complexes on various microorganisms was also investigated. The optimal form and biological accessibility of the metal complexes were examined by the Gaussian 09W algorithm. These compounds were screened for drug-like activity and pharmacokinetic studies using the free SWISS ADME online software. The positive outcomes of molecular docking studies on the COVID-19 virus and cancer DNA are interesting.
To obtain the highest level of biological effectiveness, four transition metal viz., Cu(II), Zn(II), Co(II) and Ni(II) complexes viz. were synthesized using Schiff base obtained by the condensation reaction of o-phenylene diamine, 4-chlorobenzaldehyde and a co-ligand (malonic acid). Elemental analysis and other spectroscopic methods were used to identify them. All the synthesized metal(II) complexes have a square planar geometry, according to the physico-chemical analyses. The antibacterial properties of the ligand and its metal(II) complexes on various microorganisms were also studied. SWISS-ADME online freeware was used to screen these compounds for drug-like action and pharmacokinetic research. Furthermore, UV absorption analyses and viscosity titrations were employed to test the efficacy of the synthesised metal complexes as DNA nucleases, and the results are consistent with an intercalative binding mechanism. The outcomes of molecular docking research on the COVID-19 virus and cancer DNA are fascinating.